Combined Interference and Diffraction
A double-slit apparatus has a slit separation of d. When illuminated by monochromatic light of wavelength λ, the first minimum of the single-slit diffraction pattern coincides with the fifth-order bright fringe of the interference pattern. What is the width of each slit?
A
When the slit width equals λ/5
B
When the slit width equals 5d
C
When the slit width equals d/5
D
When the slit width equals d
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